package com.ossfk.net.utils;

public class CrcHelper {
    public static int crc16(byte[] bytes){
    	int crc = 0xFFFF;
	    for (int j = 0; j < bytes.length ; j++) {
	        crc = ((crc  >>> 8) | (crc  << 8) )& 0xffff;
	        crc ^= (bytes[j] & 0xff);//byte to int, trunc sign
	        crc ^= ((crc & 0xff) >> 4);
	        crc ^= (crc << 12) & 0xffff;
	        crc ^= ((crc & 0xFF) << 5) & 0xffff;
	    }
	    crc &= 0xffff;
        return crc;
    }
}

